EN 60068-2-14:2009
(Main)Environmental testing - Part 2-14: Tests - Test N: Change of temperature
Environmental testing - Part 2-14: Tests - Test N: Change of temperature
IEC 60068-2-14: 2009 provides a test to determine the ability of components, equipment or other articles to withstand rapid changes of ambient temperature. The exposure times adequate to accomplish this will depend upon the nature of the specimen. The major changes with regard to the previous edition concern: - merging of the previous version of IEC 60068-2-14 with IEC 60068-2-33: Guidance on change of temperature tests; - updating of the figures, changes to some of the wording and editorial corrections made for clarification. It has the status of a basic safety publication in accordance with IEC Guide 104.
Umgebungseinflüsse - Teil 2-14: Prüfverfahren - Prüfung N: Temperaturwechsel
Essais d'environnement - Partie 2-14: Essais - Essai N: Variation de température
La CEI 60068-2-14:2009 fournit un essai qui a pour but de déterminer l'aptitude des composants, équipements ou autres articles à subir des variations rapides de la température ambiante. Les durées d'exposition susceptibles de conduire à ce but dépendent de la nature du spécimen. Les principales modifications par rapport à l'édition précédente sont les suivantes: - fusion de l'édition précédente de la CEI 60068-2-14 et de la CEI 60068-2-33: Guide pour les essais de variations de température; - mises à jour des figures, modifications terminologiques et éditoriales faites pour clarification. Elle a le statut de publication fondamentale de sécurité, conformément au Guide CEI 104.
Okoljski preskusi - 2-14. del: Preskusi - Preskus N: Temperaturne spremembe (IEC 60068-2-14:2009)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2009
1DGRPHãþD
SIST EN 60068-2-14:2002
SIST EN 60068-2-33:2001
Okoljski preskusi - 2-14. del: Preskusi - Preskus N: Temperaturne spremembe (IEC
60068-2-14:2009)
Environmental testing -- Part 2-14: Tests - Test N: Change of temperature
Umgebungseinflüsse -- Teil 2-14: Prüfverfahren - Prüfung N: Temperaturwechsel
Essais d'environnement -- Partie 2-14: Essais - Essai N: Variation de température
Ta slovenski standard je istoveten z: EN 60068-2-14:2009
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 60068-2-14
NORME EUROPÉENNE
July 2009
EUROPÄISCHE NORM
ICS 19.040 Supersedes EN 60068-2-14:1999 and EN 60068-2-33:1999
English version
Environmental testing -
Part 2-14: Tests -
Test N: Change of temperature
(IEC 60068-2-14:2009)
Essais d'environnement - Umgebungseinflüsse -
Partie 2-14: Essais - Teil 2-14: Prüfverfahren -
Essai N: Variation de température Prüfung N: Temperaturwechsel
(CEI 60068-2-14:2009) (IEC 60068-2-14:2009)
This European Standard was approved by CENELEC on 2009-07-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60068-2-14:2009 E
Foreword
The text of document 104/481/FDIS, future edition 6 of IEC 60068-2-14, prepared by IEC TC 104,
Environmental conditions, classification and methods of test, was submitted to the IEC-CENELEC parallel
vote and was approved by CENELEC as EN 60068-2-14 on 2009-07-01.
This European Standard supersedes EN 60068-2-14:1999 and EN 60068-2-33:1999.
The major changes with regard to EN 60068-2-14:1999 concern:
– merging of EN 60068-2-14:1999 and EN 60068-2-33:1999: Guidance on change of temperature tests;
– updating of the figures, changes to some of the wording and editorial corrections made for clarification.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-07-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60068-2-14:2009 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60068-2-14:2009
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60068 Series Environmental testing EN 60068 Series
1) 2)
IEC 60068-2-1 - Environmental testing - EN 60068-2-1 2007
Part 2-1: Tests - Test A: Cold
1) 2)
IEC 60068-2-2 - Environmental testing - EN 60068-2-2 2007
Part 2-2: Tests - Test B: Dry heat
1) 2)
IEC 60068-2-17 - Environmental testing - EN 60068-2-17 1994
Part 2-17: Tests - Test Q: Sealing
1)
IEC Guide 104 - The preparation of safety publications - -
and the use of basic safety publications
and group safety publications
1)
Undated reference.
2)
Valid edition at date of issue.
IEC 60068-2-14
Edition 6.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Environmental testing –
Part 2-14: Tests – Test N: Change of temperature
Essais d’environnement –
Partie 2-14: Essais – Essai N: Variation de température
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
R
CODE PRIX
ICS 19.040 ISBN 2-8318-1022-7
– 2 – 60068-2-14 © IEC:2009
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Field conditions of changing temperature .7
4 General .8
4.1 Design of change of temperature tests .8
4.2 Test parameters .8
4.3 Purpose and choice of the tests .8
4.4 Choice of the duration of the exposure .8
4.5 Choice of the duration of the transfer time.9
4.6 Applicability limits of change of temperature tests .9
5 Guidance for the selection of the kind of test .10
6 Initial and final measurements .10
6.1 Initial measurements .10
6.2 Final measurements .10
7 Test Na: Rapid change of temperature with prescribed time of transfer .10
7.1 General description of the test.10
7.2 Testing procedure .10
7.2.1 Testing chamber.10
7.2.2 Mounting or supporting of the test specimen.11
7.2.3 Severities .11
7.2.4 Conditioning .11
7.2.5 Test cycle.11
7.3 Recovery.12
7.4 Information to be given in the relevant specification .12
8 Test Nb: Change of temperature with specified rate of change .13
8.1 General description of the test.13
8.2 Testing procedure .13
8.2.1 Testing chamber.13
8.2.2 Mounting or supporting of the test specimen.13
8.2.3 Severities .13
8.2.4 Conditioning .14
8.2.5 Test cycle.14
8.3 Recovery.15
8.4 Information to be given in the relevant specification .15
9 Test Nc: Rapid change of temperature, two-fluid-bath method .16
9.1 General description of the test.16
9.2 Testing procedure .16
9.2.1 Testing equipment .16
9.2.2 Severities .16
9.2.3 Conditioning .16
9.3 Test cycle.16
9.4 Recovery.17
9.5 Information to be given in the relevant specification .17
60068-2-14 © IEC:2009 – 3 –
10 Information to be given in the test report .18
Figure 1 – Determination of test duration time (t ).9
Figure 2 – Na test cycle .12
Figure 3 – Nb test cycle .15
Figure 4 – Nc test cycle .17
– 4 – 60068-2-14 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-14: Tests – Test N: Change of temperature
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
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